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Originally posted by Phage
reply to post by muzzleflash
Preconceived ideas do not affect data. Did you look at the graphs? The levels rise and fall. Some on a very regular basis (that's interesting). Saying you predicted it is like saying you predicted the tide will rise.
edit on 3/21/2011 by Phage because: (no reason given)
Update: 3/19/11, 2:30 P.M. bullet Many emails this morning have pointed out that the Radiation readings reported by the EPA from many of their stations in the West are much higher than those on the Radiation Network, and asked that we square the EPA readings with those from the Radiation Network. I will study the EPA data in more detail, but at first glance, the explanation for the difference goes back to a couple of points I made in my earlier update below: bullet When reporting radiation readings, units of measurement matter. The EPA readings are apparently in CPM (Counts per Minute), but CPM levels are not standardized, and instead depend upon the design of each model of detection instrument. So readings in CPM are not comparable except to historical readings made by the same instrument. I am hoping that the EPA detectors are something much more specialized and sensitive than the models typically used by our Monitoring Stations. For example, if a "counting tube" has a larger physical size and greater surface area, then it follows that the count rate, measured by the number of radiation particles that it "captures", will thus be higher. bullet In contrast, the type of Geiger counters typically in use by Monitoring Stations in the Radiation Network are best described as personal radiation detectors or of the type commonly used by first responders, and in many cases, the exact same model in use by the NYC Fire Department. These counters are built around a fairly standard sized "counting tube", and in many cases better, but having said that, are obviously sensitive enough to detect background radiation, and them some. bullet So bottom line, the question for the EPA is can their CPM measurments be converted to a standardized unit of measurement, such as uR/hr, in the same way that the CPM levels on our Radiation Map are roughly equivalent to uR/hr as well, subject to the qualifications I cited below. bullet As a double check on my reasoning here, I stepped out of my Prescott, Arizona office this morning with two different models of Geiger counters, to sample environmental radiation levels, and found the total level quite normal for our mile high altitude, in the 15 to 20 uR/hr range. Interestingly, this mimicked the readings I was getting from a similar detector indoors in my office. bullet In summary, this is not to say that the environment outside my office here lacked any radioactive contaminants at all, but their presence was not detectable by just a general sampling of the environment. We will, and we should leave it to the EPA to break a total radiation level down to its constituent parts.
Originally posted by Phage
reply to post by favouriteslave
They are probably all "correct". They are just showing different things.
But by looking at historical data it can be seen that the fluctuations and levels are well within normal background levels.
edit on 3/21/2011 by Phage because: (no reason given)